Field and laboratory tests were initiated to evaluate the concept of using sprayed molten zinc as a concrete surface anode for sacrificial cathodic protection of imbedded reinforcing steel. For this initial evaluation, zinc was applied to the splash zone of a marine bridge substructure containing epoxy coated rebars and to the underside of a bridge deck containing plain (uncoated) rebars. Both bridges had varying degrees of visible deterioration caused by corrosion. Laboratory samples consisted of zinc coated concrete cylinders with a single steel rebar in each.

The field and laboratory tests included measuring current flow, cathode potential shifts, polarization decay, the effect of surface coatings applied to the zinc surface and visual determinations of zinc bond properties.

Subject
Depolarization, Electric current, Zinc rich coatings, Cathodic protection, Probes, Rebar, Current densities, Electric potential, Zinc, Epoxies, Bridges, Concrete, Electrode potential
© 1990 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1990
Association for Materials Protection and Performance (AMPP)
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